Medical Secrets from the Royal Library

例句：

1. 1. The book is a treasure trove of medical secrets.
   这本书是医学秘密的宝库。
2. 2.The royal library has been closed for repairs.
   皇家图书馆因维修而关闭。
3. 3. The medical secrets of ancient Egypt have never been fully understood.
   古埃及的医学秘密从未被完全理解。